Denial

David van Scouten has posted a tutorial video on how to convert pictures using the tools (in german) here: https://odysee.com/@DvS_Arcade:b/VIC-20_Image-Tut:6 If anyone wants to try it themselves, this is a good starting point. Some things can be streamlined, but it certainly works the way he explai...

Steps to reproduce: please post the exact steps on the tracker :) (also pls try if you really have to remove the ini, or if starting with -default is good enough) Done, starting with -default is good enough (e.g. NTSC-interlace works). But starting with a saved .ini it crashes once interlace-mode i...

Tried the newer versions on both PAL and NTSC. I always have to press "Space" once the test finishes, then the VIC20 does a reset. Is that correct behaviour? It never finishes without pressing the spacebar on both PAL/NTSC. Attached please find my 4 result-files. While I got your attention...

This promises to be interesting:

https://www.youtube.com/watch?v=JeGCC2Kgqik

Excellent analysis! Just playing around with your findings a little to see which portion of the video-RAM gets displayed. This seems to be just VM/2, right? In your example above for $9000 = 36 and $9002 = 22 (standard) the value for VM goes from $000 to $020 because only 16 (of the 22) chars of 2 c...

nbla000 wrote: ↑Sat Feb 19, 2022 10:51 am Do you use a 1541/1571/1581 drive + Jiffy ROM or a sd2iec device?

Just an SD2IEC-device.

Glad to have helped. But then what did you mean by "repair tool"?

Again, the MegaCart has a universal PAL/NTSC-fix for this. It removes a table for the registers $9000 to $900f, sets standard values using a ROM-call instead and just manually puts the needed values in the remaining registers thus not touching $9000 and $9001.

Strange, usually I can fix such issues (like no music at all), by holding CTRL and then selecting "RESET PREFS". Have you tried reseating the cart or using a different VIC-20? Maybe NVRAM is starting to go bad? nbla000 should know more.

The non-patched ROM-images are causing so much confusion nowadays and Mega-Cart has been out-of-production for so long that it would be nice to have an archive of the patched Mega-Cart ROM-images for the affected cartridges. I realize that some of the images require code outside their own ROM-images...

In any case if you don't have/use pi1541 but just sd2iec devices or CBM drives with JiffyDOS there is no reason to install SJLOAD09. Of course. I just wonder: There seems to be only one version of SJLOAD07. Is this PAL-only? A self hacking runtime code is not possible because when you write on $9E0...

Talking about Mega-Cart, the next SJLOAD version will check $ede4 in ROM and if the "installed" version is for that system uses it else uses kernal load, so you may install the PAL version but if you use a NTSC machine, the SYS40000 do nothing and LOAD works anyway (kernal protocol). To b...

Are the NTSC- and PAL-variants very different? Since I use my Mega-Cart on both machines it would be nice to have a "universal"-version (V9) provided it still fits in the free space on the Mega-Cart. Also: obvious less bug reports from users with a version that checks for PAL/NTSC-device (...

Yes, this is most definitely the same effect. I just found that back in 2018, Mike and I discussed this and I adapted/improved the test-program by Lance to better analyze the problem. Try the attached D64. Should work with or without expansion. It basically fills the screen with chars 0-255 and each...

Once again here is the charflow-testprogram by Lance since the link above is dead. In fact since the program is so small and simple here's the source as well: 10 c=11 20 for a=0 to 255 30 poke 38400+a,0 40 poke 38656+a,0 50 poke 7680+a,a 60 poke 7936+a,a 70 next a 80 c=c+1 90 poke 36864,c 100 poke 7...